diff options
| author |   Yunhong Jiang <yunhong.jiang@linux.intel.com> | 2017-03-08 23:13:28 -0800 |
|---|---|---|
| committer | Yunhong Jiang <yunhong.jiang@linux.intel.com> | 2017-03-08 23:36:15 -0800 |
| commit | 52f993b8e89487ec9ee15a7fb4979e0f09a45b27 (patch) | |
| tree | d65304486afe0bea4a311c783c0d72791c8c0aa2 /kernel/drivers/net/ethernet/intel/e1000 | |
| parent | c189ccac5702322ed843fe17057035b7222a59b6 (diff) | |
Upgrade to 4.4.50-rt62
The current kernel is based on rt kernel v4.4.6-rt14. We will upgrade it
to 4.4.50-rt62.
The command to achieve it is:
a) Clone a git repo from
git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git
b) Get the diff between this two changesets:
git diff 640eca2901f3435e616157b11379d3223a44b391
705619beeea1b0b48219a683fd1a901a86fdaf5e
where the two commits are:
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
640eca2901f3435e616157b11379d3223a44b391
640eca2901f3 v4.4.6-rt14
localversion-rt
[yjiang5@jnakajim-build linux-stable-rt]$ git show --oneline --name-only
705619beeea1b0b48219a683fd1a901a86fdaf5e
705619beeea1 Linux 4.4.50-rt62
localversion-rt
c) One patch has been backported thus revert the patch before applying.
filterdiff -p1 -x scripts/package/Makefile
~/tmp/v4.4.6-rt14-4.4.50-rt62.diff |patch -p1 --dry-run
Upstream status: backport
Change-Id: I244d57a32f6066e5a5b9915f9fbf99e7bbca6e01
Signed-off-by: Yunhong Jiang <yunhong.jiang@linux.intel.com>
Diffstat (limited to 'kernel/drivers/net/ethernet/intel/e1000')
| -rw-r--r-- | kernel/drivers/net/ethernet/intel/e1000/e1000.h | 7 | ||||
| -rw-r--r-- | kernel/drivers/net/ethernet/intel/e1000/e1000_main.c | 5 |
2 files changed, 9 insertions, 3 deletions
diff --git a/kernel/drivers/net/ethernet/intel/e1000/e1000.h b/kernel/drivers/net/ethernet/intel/e1000/e1000.h index 69707108d..98fe5a2cd 100644 --- a/kernel/drivers/net/ethernet/intel/e1000/e1000.h +++ b/kernel/drivers/net/ethernet/intel/e1000/e1000.h @@ -213,8 +213,11 @@ struct e1000_rx_ring { }; #define E1000_DESC_UNUSED(R) \ - ((((R)->next_to_clean > (R)->next_to_use) \ - ? 0 : (R)->count) + (R)->next_to_clean - (R)->next_to_use - 1) +({ \ + unsigned int clean = smp_load_acquire(&(R)->next_to_clean); \ + unsigned int use = READ_ONCE((R)->next_to_use); \ + (clean > use ? 0 : (R)->count) + clean - use - 1; \ +}) #define E1000_RX_DESC_EXT(R, i) \ (&(((union e1000_rx_desc_extended *)((R).desc))[i])) diff --git a/kernel/drivers/net/ethernet/intel/e1000/e1000_main.c b/kernel/drivers/net/ethernet/intel/e1000/e1000_main.c index fd7be860c..068023595 100644 --- a/kernel/drivers/net/ethernet/intel/e1000/e1000_main.c +++ b/kernel/drivers/net/ethernet/intel/e1000/e1000_main.c @@ -3876,7 +3876,10 @@ static bool e1000_clean_tx_irq(struct e1000_adapter *adapter, eop_desc = E1000_TX_DESC(*tx_ring, eop); } - tx_ring->next_to_clean = i; + /* Synchronize with E1000_DESC_UNUSED called from e1000_xmit_frame, + * which will reuse the cleaned buffers. + */ + smp_store_release(&tx_ring->next_to_clean, i); netdev_completed_queue(netdev, pkts_compl, bytes_compl); |